Sound velocity measurements by x-ray shadowgraph technique for melting phenomena at ultrahigh-pressure regime

K Shigemori; T Sakaiya; Y Asakura; T Kondo; K Shimizu; T Kadono; Y Hironaka; H Azechi

doi:10.1063/1.4739055

Sound velocity measurements by x-ray shadowgraph technique for melting phenomena at ultrahigh-pressure regime

Rev Sci Instrum. 2012 Oct;83(10):10E529. doi: 10.1063/1.4739055.

Authors

K Shigemori¹, T Sakaiya, Y Asakura, T Kondo, K Shimizu, T Kadono, Y Hironaka, H Azechi

Affiliation

¹ Institute of Laser Engineering, Osaka University, Suita, Osaka, Japan.

PMID: 23127036
DOI: 10.1063/1.4739055

Abstract

Developments in measuring sound velocity of matter under ultrahigh pressure are described. We employed a time-resolved x-ray shadowgraph technique to measure the sound velocity of shock-compressed diamond and iron foils at around melt. The sound velocity significantly dropped at melting, a behavior that has been difficult to clarify by conventional measurements by subtracting particle velocity from shock velocity (u(s) - u(p)). In addition to sound velocity, other important parameters were also obtained simultaneously.